Grate



3 Sheets-"Sheet l.

J. CHRISTIE.

GRATE.

Patented Nov. 9, 1886 (Np Model.)

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(No Model.) 7 3 Sheets-Sheet 2. J. CHRISTIE.

- GRATB. v N0.'352,2Z3. Patented NOV. 9, 1886.

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Patented Nov. 9, 1886.

By Afforney IWV WITNESSES n, PETERS, Phflomlmgnpher, Wnhingtnn, no.

UNITED STATES PATENT OFFICE.

JACOB OEIRIsTIE, OF LONG ISLAND CITY, ASSIGNOR TO sHRRWOOD STERLING, or BROOKLYN, NEW YORK.

GRATE.

r SPECIFICATION forming part of Letters Patent No. 352,223, dated November 9, 1886.

Application filed October 211884.. Serial N 0. 146.531. (No model.)

To all whom it may concern.-

Be it known that I, J AOOB CHRISTIE, a citizen of the United States, residing at Long Island City, in the county of Queens and State of New York, haveinvented anew and useful Improvement in Grates, of which the following is a specification.

My invention relates to that class of furnacegrates wherein the grate-bars may be removed and replaced separately, andso arranged thatthey can be rocked alternatelyin opposite 1ongitudinal directions; and it consists in the peculiar construction of the rocking mechanism and variousv combinations, more particularly set forth inthe'claims.

In the drawings, Figure 1 is atop view of a grate with only two. grate-bars shown, which is sufficient to illustrate my improvement. Fig. 2 is a sectional view of Fig. 1 through the line 00 m. Fig. 3 is a bottom view of Fig. 1. Fig. 4 is a sectional View of Fig. 3 through the liney 3 Fig. 5 is a side view of one of the gratebars. Fig. 6 is a top sectionalview of the forward part of the grate, showing more clearly the pins and the moving mechanism. Fig. 7 is a sectional view showing the beveled lower edges of the rockers. Fig. 8 is a sectional view through the line. 3/31 of Fig; 6, showing the bolts for holding the header-bars to the frame.

Similar letters of reference indicate corresponding parts in all the figures.

A A represent the walls of a fire-box or furnace. On the front and rear walls are constructed dead-plates B'B, on which the gratebars E E rest when'they are not being shaken, and also serve as asupportfor the independent frame D D,which holds the mechanism for giving alternate longitudinal motion to the gratebars.

G O are cross bars or headers forholding the grate-bars in position, and are provided on their under sides with guiding-lugs M, and are firmly secured to the frame D by bolts 0 0 or any desiredmeans. The grate-bars can be constructed in any of the known or usualways. Each grate-bar is provided on its under side with two triangular-shaped recesses or slots, 8 s, to receive the upper beveled edges of the rockers. a a ac are rockers, by means of longitudinal directions.

which the grate-bars can be moved in alternate In the lower sides of the fraIne'D are grooves, in which rest the cross-bars b b,a11d these crossbars are provided with lugs or projections c c, which have suitable recesses on their upper sides to hold and support the rockers. These rockers are constructed with their lower edge beveled, as'shown at m m in-Fig. 7, where they rest on the lugs c 0, so as to reduce the friction, and their upper edges are also beveled, where the grate-bars rest on' them when they are being moved. The upper sides of these rockers have also alternate sections cut out of them a little wider than the width of a grate-bar, in order that the grate-bars, when they rest on their respective rockers, may be enabled to pass each other in their movement lengthwise. Thus a grate-bar resting upon the rockers ac, Fig. 2,will in its longitudinal movement pass through the opening or recess made in the rockers- (t a, on which the next grate-bar rests,

and so on continuously.

On the under side of the front cross-bar, b, is pivoted a lever, d,with right-angled slotted arms ff, in whichslots move the pins e 6, one

of these pins projecting downward from the front rocker a and the other from the other front rocker, a. This lever d moves laterally, and is provided with a socket, into which the adj ustableeXtension-lever y can be inserted. When this lever d is in the extreme right or left position, all the grate-bars will rest on the dead-plates,and in this position are independ ent of the shaking or moving mechanism; but when this lever d is moved either from the extreme right or left position it raises the gratebars from these dead-plates, and they then rest upon' the rockers alone and can be moved longitudinally, those resting 011 one set of rockers moving in one direction and those resting upon the other set in an Opposite direction.

. In the drawings I have only shown single grate-bars; but it is obvious that two or more grate-bars may be connected together without changing the character of my invention.

In operation,when thelever dis moved either to the right or to the left, alternate motion is given to the forward rockers by means of the pins e e in the slots of the lever, one of these pins giving aforward movement to one of the front rockers and the other pin a backward movement to the other front rocker. As soon as these front rockers are moved in either direction, then their top edges seize hold of the under side of their corresponding grate-bar and raise it from the dead-plate. The grate-bars then serve the additional purpose of connecting-rods between the forward and rear rockers and cause the rear rockers to raise the rear ends of the grate-bars from the rear dead-plate. The grate-bars can now be moved in opposite directions by alternately moving the shakinglever. Vhen the shaking-lever is returned either to the extreme right or left position, the grate-bars will again rest upon the forward and rear dead-plates and be entirely free and clear from the shaking mechanism.

I am aware that furnace-grates have been constructed wherein each gratebar was entirelysupported at one or both ends upon pivoted arms, and alternate motion given to the grate-bars by means of peeuliar-shaped levers and connecting-rods attached to each grate-bar or sets of bars. In my improved grate all the grate-bars are free from any direct connection with the frame or vibrating mechanism, and' the rockers and their supports are eaehand all made separate,and are not directly attached to each other or to the frame, furnace, and ash-pit, so that by this construction any of the gratebars or rockers or rocker-supports can readily be removed from the frame and replaced when desired.

I claim as my invention 1. In a furnace-grate, the combination of front and rear rockers, rocker-supports, slotted lever, movable grate-bars, frame,and deadplates 011 which the grate-bars rest, when arranged and combined in the manner herein shown and described. 2. The combination of lever 11, front and rear rockers, a a a/ a, movable grate-bars E E, dead-plates 13 B, and frame D with the walls of a furnace, in the manner herein shown and described.

3. In a furnace-grate, the combinatiomwith the walls of a furnace provided with deadplates, of an independentframe for supporting the grate, header-bars for holding the grate- V bars in position,grate-bars,and mechanism for moving the grate-bars, consisting of separate rockers and rocker-supports, and a vibrating lever, all when arranged as herein shown and described, and for the purposes set forth.

4. The combination of thelever d, provided with slotted arms f f, front and rear rockers, a a a a, downwardly-projecting pins 0 c, and rocker-supports c c, with grate-bars E E and frame D, and furnace-walls A, provided with dead-platesB B as herein shown and described, and for the purposes set forth.

JACOB CHRISTIE.

Witnesses:

V. H. BRIGGS, JOHN F. MAoGwYRn. 

